Synthetic Sapphire with Diffusion-Induced Color and Star
Diffusion treatment is used to induce color and asterism in a colorless synthetic sapphire.
Maine Pegmatite Workshop
A report summarizing the expeditions and lectures at the June 2015 pegmatite workshop in Poland, Maine.
Unique Tourmaline Necklace
An unusual parti-color tourmaline necklace and clasp are seen at the 2015 AGTA show in Tucson.
Rock Creek（岩溪）蓝宝石矿床的更新消息 (英语)
An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.
Nonbead-Cultured Pearls from Strombus Gigas
Advances in pearl culturing are seen in a parcel of specimens from Strombus gigas gastropods.
Large Cat’s-Eye Emerald from Brazil
A translucent Brazilian emerald exhibiting pronounced chatoyancy is examined.
Green Nephrite Jade Attracts Buyers in Tucson
An update on the nephrite jade market from the 2015 GJX show.
Large Namibian Demantoid Garnet
The Green Dragon mine yields exceptional demantoid, including a round brilliant seen at Tucson’s GJX show.
Diamond Slices
The popularity of gem slices, particularly diamond, is on the rise, as reflected at the 2015 Tucson gem shows.
Unusual Combination of Inclusions in Synthetic Star Sapphire
A hexagonal boundary, usually found in natural material, is observed in a synthetic star sapphire.
Blue Chalcedony Partially Filled with Epoxy Resin
A carving identified as blue chalcedony shows evidence of epoxy resin treatment.
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